Bug 14873: Remove C4::Dates from reserve/request.pl

Bug 14873: Remove C4::Dates from reserve/request.pl

This bug removes deprecated C4::Dates from reserve/request.pl

To test:
- Apply patch
- In staff client, search a biblio and try to put a hold for a borrower (Home > Catalog > [Some Biblio] > Place a hold to [Some biblio])

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>